Sacrifice

In AD 303, five honorary columns were added behind the Rostra, the first major structures to be erected in the Forum since the time of Septimius Severus. They celebrated the tenth anniversary of the Tetrarchy, which was the occasion of Diocletian's only visit to Rome as emperor.

One of the marble pedestals, the so-called Decennalia Base, was discovered in 1547 and has been placed nearby on the Via Sacra. In this view, a bull, a sheep, and a pig, accompanied by attendants are shown. They were the traditional sacrifice to Mars.